Fuel-injecting device for internal-combustion engines



@mik @5 119% www@ F. EDHOLM FUEL INJECTING DEVICE FOR INTERNAL GOMBUSTION ENGINES Filed June 27t l92l advan ject-ion takes place, in the direction tow .the cooled Patented Apr. l5, 1924.

Ninn STATES' PATENT carica.

Emme Ennemi, or EsxILsrUNa, SWEDEN.

nnnnmmorme nE'vIcE ron INTERNAL-connexion ENGINES.

`Ap'uplioatlon med vJfune 27,1881. Serial No. 430,861.

To all 'whom t may concern:

Be it known that I, Fnnnnrc. EnHonM, a citizen of the Kin dom of Sweden, res1ding at Eskilstuna, weden, have invented new and useful Improvements in Fuel-In-V jcting Devices` for Internal-Combustion ngines, of which the follow-lng 1s a specication. j in internal combustion engines using liquid fuel in which` the walls of the combustion chamber are, in part, cooled by water and, in'part, not cooled it may happen that in case the fuel is injected towards the non-cooled part' of the i 'tion' chamber, the latter will be too hot-w en the engine is loaded, thereby causing an early ignition which will t in a decrease of the power oi? the engine. 0n the other hand, if fuel is in'ected towards the cooled part, the engine w en running light cannot maintain its temperature suiliciently high ess provision. 1s made for a separate-heating et the non-cooled mi :i

To overcome said diculty it has been proposed to@ provide the fuel injecting device with eccentrically or obliquel erred ontlet openings andmount said evice rotatabl so that b rotation of said device the di# rection o the injected fuel may M varied. When the fuel is sprayed it may happen in such engines that theV amount of fuel9 supplied to the engine when al: ing light, is too small to reach. the non-cooled por tion of the ignition chamber. This would result in preventing the light running. 0n the` other hand as spreading; of the fuel is cous at full load, t e injecting device is so arranged according to this invention, as to spread the fuel, when the inrtion of the ignition il 'ii-.r ber; By inject' the fuel as non-dividd jet, when the injection takes lace in. the direction'towards the non-coo ed the jet is able to reach said non-coo ed portion.

is a cross section of tion;

Fig. 2 is a longitudinal sectmn of the fuel ln the accoinpanyin injecting device;

'-With. reference to Fig. 2, the numeral 1- designates the -casing of the device. Said Formed in the conica .f vice. The fuel will in such rtion,

casingis' shad to form a sleeve hav-ing a cylindrical ring, in whichis rotatably mounted a cylinder 2 and a bolt 5 situated in axial alinement with said cylinder. The

cylinder 2 is closed at its outer end bye conical end rtion 20 en agi a conical Seat formedllt the end ogf thlugboring oi the casing 1. En aging the cylinder 2, at the o positie end t 'ereo is a projection 50 exten ing from the bolt 5 and connected with the cylinder 2 b means of a crom- Pin d, extending throug an o ning formed 1n the projection 50 and furt er extending through an axial'slot 3 formed in the cylinder 2. The end of the bolt 5 away from the cylinder`2 is shaped to form a conical valve vbody 51, engaging' a correspondin seat formed at the inner end of a nut screwed in the casi 1 and through which the bolt 5 extends. e bolt 5 carries a hand-w eel 8. Formed on the periphery oi the bolt 5 are axially extending oov'es 52 counicating on the one han with a fuel inlet 6 formed in the casing l, and on the other hand with. the space 53 surrounding the projection 50. end portion 20 of the cylinder 2 is an obliquely extending' aperture 21 forming an outlet passage for the fuel.

Inserted in the cylinder 2 is a member 12 the leit end of which `fits in the boring of the casing 2 and is formed with spirally extending grooves. Formed in the member 12 between its ends are two circumferentially extending grooves 16 and 17. The 'groove 16 communicates in the wition shown through hole 14, charme/113, space 53, and mw 52 with. the fuel inlet 6 of the de d ositioi be ro tate in passing through t e sai spira grooves and be finely divided. Formed centrally in the` member 12 is a hole 18 commumcating at one end with the space left in front o 'the outlet openin 21, and at 'the \other end with the groove 1 After a 1'0- tation of the bolt 5, through half a revolution awa vfrom the posltion shown, the hole 15 ormed in the cylinder 2 leading to the oove 17 will communicate with the channe 13, while the hole 14 is closed; Fuel will now pass from 6 through channel 13, hole 15 and throu h the central hole 18 and will then Ybe ejected through the aperture 21 in the conical fore end portowards the cooled portionl 9 o tion 2O as a non-divided jet, as iiuiic'eted` by the dotted lines, directed upwardly and forwardly. g I i In Fig. 1 there is shown a fuel injectm device according to this invention inserte into the wall of en ignition chamber. The full lines show the fuel as a sgrey directed the ignition chamber said direction of injection of the fuel bein used in case of full load on the engine. ith the engine running light, the hand wheel 8 is turned so that the fuel 1s injected as a solid jet towards thenoncooled portion 10 of the ignition chamber, as indicated by the dotted line.

What l claim is:

A fuel injecting device for internal combustion engines, com rising in combination longitudian outer carrier bo y havingme ring and a.

nelly extending cylindrical neediee fuel inlet communicating with said boring, e conical seat formed at the inner end of A the boring, an angularly adjustable sleeve fitting in said boring and having two -sepw rate fuel passa 4es communicating with said fuel inlet at different angular positions of the sleeve, e conical bottom ait one end of the sleeve engaging said conical seat und having a fuel outlet .formed in it, e body fitting in said' sleeve adjacent the said conical bottom seid body having external spreading channels Vforming communication between said outlet end with one of said fuel passa es and e central channel between the ot er of said fuel passages and said fuel outlet, and means for varying theanguler position of said sleeve.

ln testimony whereof l have signed my name. FREDRIC- EDHOLM. 

